I'd like to add an LWA button to my site, which should help me to get user's clientId, clientSecret, refreshToken, sellerId, MWSAuthToken, AWSAccessKeyId and secretKey from their merchants accounts. I need to take their product selling data and advertising data. Certainly if they will accept this action by LWA button. But I found only "profile" scope for this which can return me just a customerId. What scope should I use for this?